/* Site layout (shared structure). Colours and fonts come from the theme variables set in <head>. */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);background:var(--bg);color:var(--ink);line-height:1.65;font-size:17px;display:flex;flex-direction:column;min-height:100vh;overflow-x:hidden}
main{flex:1}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--brand2)}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .6em;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.4vw,2.8rem);font-weight:800}
h2{font-size:clamp(1.45rem,2.8vw,1.95rem);font-weight:700}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}
.page-narrow{max-width:820px}
.center{text-align:center}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:8px 14px;z-index:9999}
.skip-link:focus{left:8px;top:8px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:2px solid var(--brand);padding:12px 22px;border-radius:12px;font-weight:700;text-decoration:none;cursor:pointer;font-family:inherit;font-size:1rem;transition:transform .12s,background .15s}
.btn:hover{background:var(--brand2);border-color:var(--brand2);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--brand)}
.btn-ghost:hover{background:var(--soft);color:var(--brand2);border-color:var(--brand2)}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.3rem}
.logo b{color:var(--brand)}
.logo-mark{display:inline-flex;width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff;align-items:center;justify-content:center;font-size:1.05rem}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{padding:9px 14px;border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:.97rem}
.nav-link:hover{background:var(--soft);color:var(--brand)}
.nav-link i{font-size:.7rem;margin-left:4px}
.nav-drop{position:relative}
.nav-menu{display:none;position:absolute;top:100%;left:0;min-width:270px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 40px rgba(15,23,42,.14);padding:8px;z-index:60}
.nav-drop:hover .nav-menu,.nav-drop:focus-within .nav-menu{display:block}
.nav-menu a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;text-decoration:none;color:var(--ink);font-size:.95rem}
.nav-menu a i{width:18px;color:var(--brand);text-align:center}
.nav-menu a:hover{background:var(--soft)}
.menu-btn{display:none;background:none;border:0;font-size:1.4rem;color:var(--ink);cursor:pointer;padding:8px}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 20px 16px}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:10px 0;color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1px solid var(--line)}
.mobile-nav a.sub{font-weight:400;padding-left:14px;font-size:.95rem}
/* hero */
.hero{background:linear-gradient(180deg,var(--soft),var(--bg));padding:56px 0 36px}
.hero-inner{text-align:center;max-width:820px}
.eyebrow{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--brand);font-weight:700;font-size:.85rem;padding:6px 14px;border-radius:99px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:1.18rem;color:var(--muted);max-width:660px;margin:0 auto 24px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:22px}
.hero-points{list-style:none;padding:0;margin:0;display:flex;gap:10px 22px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:.95rem}
.hero-points i{color:var(--accent);margin-right:6px}
section.wrap{padding-top:34px;padding-bottom:34px}
.section-head{margin-bottom:22px}
.section-head p{color:var(--muted);margin:0}
.calc-section{padding-top:20px}
.calc-col{width:100%;max-width:430px;margin:0 auto}
/* cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.tool-card{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px;text-decoration:none;color:var(--ink);transition:box-shadow .15s,transform .15s,border-color .15s}
.tool-card:hover{box-shadow:0 10px 26px rgba(15,23,42,.09);transform:translateY(-2px);border-color:var(--brand);color:var(--ink)}
.tool-ico{flex:0 0 44px;height:44px;border-radius:12px;background:var(--soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:1.1rem}
.tool-body{display:flex;flex-direction:column;gap:2px}
.tool-body strong{font-size:1.02rem}
.tool-body span{color:var(--muted);font-size:.92rem;line-height:1.45}
/* prose blocks */
.block-text{max-width:820px;margin:0 auto}
.block-text h2{margin-bottom:.7em}
.prose{max-width:820px}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.3em}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1.1em}
.prose li{margin-bottom:.45em}
.prose table,.block-text table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.97rem;display:block;overflow-x:auto}
.prose th,.prose td,.block-text th,.block-text td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th,.block-text th{background:var(--soft)}
.prose blockquote,.block-text blockquote{margin:1.2em 0;padding:14px 18px;border-left:4px solid var(--accent);background:var(--soft);border-radius:0 12px 12px 0}
.prose code{background:var(--soft);padding:2px 6px;border-radius:6px;font-size:.92em}
.note-box{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:1.2em 0}
.lead{font-size:1.15rem;color:var(--muted);max-width:760px}
.hub-prose{margin-top:34px}
/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.step{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px 18px;position:relative}
.step-n{display:inline-flex;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-bottom:10px}
.step h3{margin-bottom:.35em}
.step p{margin:0;color:var(--muted);font-size:.96rem}
/* guides */
.guide-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.guide-list.compact{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.guide-card{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;text-decoration:none;color:var(--ink);transition:box-shadow .15s,transform .15s}
.guide-card:hover{box-shadow:0 10px 26px rgba(15,23,42,.09);transform:translateY(-2px);color:var(--ink)}
.guide-card strong{font-size:1.1rem;line-height:1.3}
.g-desc{color:var(--muted);font-size:.95rem;line-height:1.5}
.g-meta,.byline{color:var(--muted);font-size:.88rem}
.tag{align-self:flex-start;display:inline-block;background:var(--soft);color:var(--brand);font-weight:700;font-size:.78rem;padding:3px 10px;border-radius:99px;text-transform:uppercase;letter-spacing:.04em}
.more-link{margin-top:18px}
.more-h{margin-top:2em}
.cta-box{background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:2em 0}
.cta-box p{margin:.4em 0}
/* faq */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:14px;align-items:center;padding:15px 18px;font-weight:600}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--brand);font-size:.85rem;flex:0 0 auto}
.faq-body{padding:0 18px 16px;color:var(--muted)}
.faq-body p:last-child{margin-bottom:0}
/* crumbs */
.crumbs{font-size:.88rem;color:var(--muted);margin:22px 0 10px}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 8px}
/* tool page */
.tool-box{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:22px;align-items:start;margin:22px 0 10px}
.tool-form{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 8px 24px rgba(15,23,42,.05)}
.field{margin-bottom:14px}
.field label{display:block;font-weight:600;font-size:.93rem;margin-bottom:5px}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:11px;font:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--soft)}
.field small{display:block;color:var(--muted);font-size:.8rem;margin-top:4px}
.calc-go{width:100%;margin-top:4px}
.tool-out{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px;min-height:180px}
.out-empty{color:var(--muted)}
.out-error{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:12px 14px;border-radius:12px}
.out-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.out-card{background:var(--soft);border-radius:12px;padding:12px 14px}
.out-card span{display:block;font-size:.8rem;color:var(--muted)}
.out-card strong{font-size:1.15rem;word-break:break-word}
.out-card.big{grid-column:1/-1;background:var(--brand);color:#fff}
.out-card.big span{color:rgba(255,255,255,.8)}
.out-card.big strong{font-size:1.7rem}
.out-steps{margin-top:16px}
.out-steps h3{font-size:1rem}
.out-steps ol{padding-left:1.2em;margin:0}
.out-steps li{margin-bottom:6px}
.out-table-wrap{overflow-x:auto;margin-top:14px;max-height:340px;overflow-y:auto}
.out-table{width:100%;border-collapse:collapse;font-size:.88rem}
.out-table th,.out-table td{padding:7px 10px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.out-table th:first-child,.out-table td:first-child{text-align:left}
.out-table thead th{position:sticky;top:0;background:var(--soft)}
.out-note{color:var(--muted);font-size:.88rem;margin-top:12px}
.tool-prose{margin-top:28px}
/* footer */
.site-footer{background:var(--footer);color:#cbd5e1;margin-top:50px;padding:44px 0 20px}
.site-footer a{color:#e2e8f0;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px}
.site-footer h4{color:#fff;font-size:.95rem;margin-bottom:.8em}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.5em;font-size:.93rem}
.footer-brand p{font-size:.93rem;color:#94a3b8;margin-top:12px;max-width:320px}
.site-footer .logo{color:#fff}
.footer-base{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:18px;font-size:.85rem;color:#94a3b8}
@media(max-width:860px){
  .main-nav{display:none}.menu-btn{display:block}
  .tool-box{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  body{font-size:16px}
  .hero{padding:38px 0 24px}
  .footer-grid{grid-template-columns:1fr}
  .wrap{padding:0 16px}
}

.tool-box>*{min-width:0}
.tool-out{overflow:hidden}
.out-table{min-width:420px}